233311domain: NAppears in sequencesProduct of first n palindromic primes plus 1.at n=5A030521LookAndSay(n) is palindromic.at n=24A079676Number of length-4 0..n arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.at n=20A268458a(n) = Sum_{d|n} (d^d)', where ' is the arithmetic derivative.at n=5A347146